Jawabanmu

2014-02-26T20:58:15+07:00
Misalkan
l = pertambahan panjang = 1 cm
r = 1/2 d
r = 3/4 cm
r = 3/4 x 10^-² m
A = πr²

E = FL/Al
F = EAl/L
F = (7)(22/7)(3/4 x 10^-²)²(1)/(50)
F = 3,3 x 10^-5 N

CMIIW :3
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